启动/备用变压器保护配置剖析

摘要

简要介绍启动/备用变压器的常用接线和运行特点，给出了一般设计中所配置的保护类型及其特点，其中重点介绍启动/备用变压器的后备过电流保护、高压侧零序保护以及低压侧分支保护。对每一类保护都列举了经常应用的几种保护配置，并对各种保护配置的优缺点进行比较，读者可以根据实际情况参考选择配置。%The characteristics in the operation and connection of SST aresummarized first.The general protection types and their features are followed.The emphases are put on the over current protection,zero-sequence protection on high-voltage side and branch protection on the low-voltage side.For each protection type,several schemes are provided.Their advantages and disadvantages are compared.The proposed schemes can be selected according to the real site conditions.